High-pressure water-tube boiler



C. A. W. BRANDT HIGH PRESSURE WATER TUBE BOILER 2 Sheets-Sheet I 1 Filed Oct. 31, 1924 2 INVENTOR. Of/PLAHKBfiA/VDZ k f e 744.. ATTORNEY.

Aug. 7, 192a 1,680,128

C. A. W. BRANDT HIGH PRESSURE WATER TUBE BOILER Filed Oct. 31. 2 Sheets-Sheet 2 if I INVENTOR. 4

X44 ATTORNEY.

" Patented Aug. 7, 1928.

CARL A. w. :snnnnnor GREAT NECK, YORK, ASSIGNOB TO THE SUPERHEATER GOMPANZ, OF NEVT YORK, N". Y.

nrsn-rnnssnnn wArEarU n BOILER.

Application filed October 31, 1924. Serial No. 747,031

This invention relatesto water tube boil ers and has particular reference to boilers usinghigh'pressures, that is, pressures of 1000 pounds or more per square inch. Its utility, however, is not confined to such high pressure boilers.

The purpose of the invention is to provide an arrangement of a boiler anda superheater particularly adapted for high pressures whichushall be inexpensive to manufacture, which is economical in operation and maintenance, and which shall have other advantages pointed out hereinafter.

The invention is illustrated in the drawings herewith in which Fig. 1 shows at the left a central vertical section and at the right an elevation with the nearest wall removed in order to show certain details of the construction; while Fig. 2 shows a section online 22 of Fig. 1.

Z The eneral arrangement "and construction 'of the boiler is similar to that shown and described in my co-pending application, Serial No. 747,032, filed October 31st, 192 1. The water tubes 17-1-of the boiler are an ranged in two triangular groups, one at the left and one at the right, as viewed-in Fig. 1. One side of the triangle in each case lies adjacent to the boiler setting, the apex of the triangle opposite this side lying at the center of the'boiler near the top. There is thus left a large combustion space A which has the shape of an inverted V. This com bustionspace is located above the furnace 2.

The water tubes 'l1 within the triangular spaces extend'from sideto side of the boiler. They are all parallel and have an upward slope toward the front as viewed in Fig. 1, and toward the left as viewed in Fig. 2. The two ends of each tube are secured to headers 33 and 4r-4 the former being lower than their corresponding opposite headers whereby the tubes receive the slope spoken of. The sets of headers, aswilllbe seen from an inspection of the drawings, lie

in vertical parallel relation. For conven ience they are made sectional, the sections being nippled together. The outermost left and right headers (Fig. 1) are extended downward somewhat below the lower points of the triangles and the tubes connecting them form a protective water screen for the furnace walls. r

The headers 33 are connected to the drum 5 by means of the tubes 6-6, while the tubular super-heater units.

stated as follows. 7 from the furnace 2 and combustion space A the headers 1- are secured to the crossbox 7 by means of the tubes 8-8. It will be understood that there is a cross-box on the left (Fig. 1) correspondingto the one shown at the right.

The steam and water drum 5 is connected to the cross-box 7 by means of tubes 99.

At l010 are shown connections from the upper part of the triangular spaces occupied by the-water tubes to the breeching 11 which in turn is connected to the stack connection 12.

The top of the triangular space is closed by the roof 13.

The headerst e lying at the inner tips of the triangular spaces are extended downwardly as shown and at their lower ends are placed short transverse headers 3" and a". The headers 3-3 and 3 are connected to the headers r e and 1 by water tubes similar in every respect to those used in the remaining portion of the boiler. They enclose a rectangular space extending downward'into the combustion chamber A, which space is provided for the superheater 1 1.

This superheater may be of any desired constructi'on,the form shown comprising headers ME -14s and l p-14 to which are connected the tubular superheater elements or units 1r. nected to the steam space of drum 5 by the steam pipe 15. The superheated steam is taken on from the headers 1414".

The roof 13 is left open at the center as at 16 and through this opening 16 extend.

This opening 16 is connected to the breching 11 by the duct 17.

In the three passages .11, 11 and 17 there are appropriate dampers, 18, 18 and 19 respectively.

The headers Li -1 are con- All The operation of this boiler may be briefly Products of combustion flow through'the space between the water tubes toward the exits 10--10 and over the superheater elements toward the outlet 16. The free area for gas passage gradually diminishes toward the exits 1010 substan tially in proportion to the shrinkage of the gases as their heat is given up to the boiler surface, so that a substantially uniform gas velocity is maintained.

The relative amount of the gases passing to the exits 10-10 and the exit 16 can be adjusted or altered by means of the dampers, so that the degree of superheat can be readily controlled.

7 Itwill be noted that this boiler uses no curved tubes, that the headers are of the simplest conformation, that there is no large and expensive steam drurn, that there is not any expensive bafihng, and that the superheater is in a location where it can furnish the high degree of superheat demanded by present practice but is nevertheless protected by'water cooled surfacesagainst the intense radiant heat from the furnace and combustion spaces. These are some of the advantageous features of iny novel boiler and superheater arrangement.

l/Vhat I claim is; v

1,.In a boiler of the class described the combination of a setting, a furnace in the lower part of the setting, boiler tubes extending transversely across the boiler space and arranged in two substantially triangular groups with one side of the triangles against opposite walls of the boiler setting and the opposite point at the upper central ,part of the boilerspace whereby there is delined an inverted V-shaped combustion space above thefurnace, a connection from each of the upper outer corners of the triangular spaces to the stack, two parallel spaced groups of transverse tubes extending downward from the inner upper points of the triangles into the combustionspace, a group of transverse tubes extending between their lower ends, whereby a generally rectangular space is delimited from the combustion space, and a superheaterextending into said rectangular space. r t

I 2.111 a boiler of the class described the combination of a setting, a furnacein the lower part the setting, boiler tubes extending transversely across the boiler space and arranged in two substantially triangular groups with one side of the triangles against oppositewalls of the boiler setting and the opposite point at the upper central part of the boiler space whereby there isdefined an inverted V-shaped combustion space above the furnace, a connection from each ofthe upper outer corners of the triangular spaces to the stack, two parallel spaced groups of transverse tubes extending downward from the inner upper points of the triangles into the combustion space, a group oftransverse tubes extending between their lower ends,

whereby generallyi'ect'angu'laf space is delimited from the combustion space, all of the said boiler tubes being parallel and hav ing an u wnaslcpe, and fa super-heater ex- 7 tending into said rectangular space;

In a boiler of the class describedthe combination of a setting, a furnace in the lower part ofthe setting, boiler tubes extending transversely across the boiler space and arranged in two substantially triangular groups with one side of the triangles against Opposite walls of the boiler settingandthe opposite point at the uppercentratpart of the boiler space wherebythere is definedan inverted V-sha'ped combustion space above the furnace, a connection ti'oin each or the upper outer corners ofthe triangular spaces to-the stack, two parallel spaced groups of transverse tubes extending downward from the inner upper points of the triangles into the combustionspace, a group of transverse tubes extending between their lower ends, whereby a generally rectangular s ace is delimited from the combustion space, all of the said tubes being parallel andhavin 'an upward slope, verticalrhcaders at the ends of said tubes to which they are secured,' and a superhcater extending into said rectangular space. i I

4'. In a boiler oi" the class de's'cribi'd combination of a setting, a furnacein'the lower part of the setting, boiler tubes extending transversely across the boiler space the 1 and arranged in two substantially triangular groups with one side of the triangles against opposite wallsof the boiler setting and the opposite point at the upper central" art of the boiler space whereby there is de ned an inverted V-shaped combustion-"space above.

the furnace, a connection from each of the upper outer corners of the triangular spaces to the stack, a damper in each "of said tions, two parallel spaced groups (it-transverse tubes extending,downward' the inner upperpoints of the triangles intoltlie combustion space, a group 'of transverse tubes extending between their lowerfends, whereby a generally rectangular space is delimited from the combustion space, a connection tofthe stack from said rectangular space, adamper in said c'onnectionpand a super-heater extending into said rectangular space.

" CARL -w. Beltane; c

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